Find the following values without a calculator.
Give your answers in this manner. (Eg
12,
23,
34,
45)
- 6 - 911 = _____
- 2210 - 120 = _____
- 524 - 4112 = _____
- 9115 - 45 = _____
(a)
6 -
911 = 5
1111 -
911 = 5
211 (b)
Make the denominators the same.
2
210 -
120 = 2
2 x 210 x 2 -
120 = 2
420 -
120 = 2
320 (c)
Make the denominators the same.
5
24 - 4
112 = 5
2 x 34 x 3 - 4
112 = 5
612 - 4
112 = 1
512 (d)
Make the denominators the same.
9
115 -
45 = 9
115 -
4 x 35 x 3 = 8
1615 -
1215 = 8
415Answer(s): 5
211, 2
320, 1
512, 8
415